Hook.



No. 784,619. PATENTED MAR. 14, 1905. A. D. HAMILTON.

HOOK.

APPLICATION FILED OUT. 11,1904.

lnueufoz f1 ndr'eu/D. VHamiZion UNITED STATES Patented March 14, 1905.

PATENT OFFICE.

ANDREW D. HAMILTON, OF EBENSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO GURNEY A. PIERCE, OF EBENSBURG, PENNSYLVANIA.

HOOK.

SPECIFICATION forming part of Letters Patent No. 784,619, dated March 14, 1905. Application filed October 11, 1904. Serial No. 228,077.

To all whom, it 7771/141 concern:

I Be it known that I, ANDREW D. HAMILTON, a citizen of the United States, residing at Ebensburg, in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in Hooks, of which the following is a specification.

The primary object of this invention is to devise a hook having a guard or mousing of IO novel formation and peculiarly designed for use in connection with extensible ladders or scafl'olding to preclude the possibility of the slipping of a section when adjusted in the required position, said hook engaging over a rung or bar and the mousing cooperating to effectively retain the hook in place.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

IVhile the invention may be adapted to different forms and conditions by changes in the 5 structure and minor details Without departing from the spirit or essential features thereof, still some of the preferred embodiments are shown in the accompanying drawings, in which' 3 Figure 1 is a perspective view of a hook embodying the invention and showing it fitted to a rod or bar. Fig. 2 is a view showing the hook applied to an extensible eyebolt. Figs; 3 and 4 are further n'iodifications.

The vital feature of the invention is comprised in the special construction of the mousing of the hook, which is of the snap-hook type, said mousing forming a guard to obviate likelihood of displacement of the part received 4 in the body of the hook, and at the same time the structure of this part is such that play or looseness of the part received in the hook is prevented, further assisting in securing the desired results as regards the general safety of the device. In the form of the invention illustrated in Fig. 1 the body or shank 1 is provided at one end with an eye 2 and at the opposite end with a hook 3, having a bill 3. A rod or bar-4 is passed through the eye 2 and serves to connect the hook to a movable 5 section of the ladder or scaifold or other part to which the device may be attached, screweyes 5 serving as means for connecting the rod 4 to said part. The guard or mousing for the hook 3 consists of a strip of spring metal and comprises a shank 6, rigidly attached at one end by rivets or the like to the shank 1 of the hook. The other end of the shank 6 of the mousing is extended outwardly and coiled to formaflat helix 7, which forms a closure for the month of the hook 3, volutes of the helix 7 being in contact with the shank l and with the bill 3 aforesaid, so as to prevent disengagement of the part that may be received in the body of the hook. IVhen engaging or disengaging 5 the hook from the rung, bar, or other part, the part 7 of the mousing of the hook is compressed to admit of ingress or egress of the rung or bar. hen the part engaged by the hook is received therein, the portion 7 springs thero- 7 over, and since the helix is entirely within the body of the hook said helix may rest in contact with the. part engaged by the hook and take up any play or looseness which might otherwise not be accommodated for and which might tend to displace the rung or bar or whatever the part may be from a position within the hook. A rung is indicated in dotted lines in Fig. 4 of the drawings before and after entering the hook part, bringing out 30 more clearly the advantage above mentioned with regard to the cooperation of the helix in taking up play or looseness. Again, in order to remove a part from the hook it is necessary to exert more than ordinary force to 5 compress the portion 7 of the mousing toward the shank 1, so that the helix may be thrown away from the bill 3 and allowed sufficient room foregress of the part engaged by the member 3 aforesaid. It will thus be 9 seen that the mousing effectively resists any tendency on the part of the element received in the hook 3 to be forced out of the same, and the safety and effectiveness of the mousing or guard means are thereby greatly promoted.

Fig. 2 illustrates a modification of the application of the invention, showing an extensible fastener consisting of the stem 8 and the barrel 9, adapted to be coupled to the stem 8 by means of a threaded connection. The stem 8 has an eye 10 swivcled thereto, and the barrel is provided at its outer end with a hook 3 and the guard or mousing, substantially as above described.

Fig. 3 shows a device of 8 form, a hook 3 being provided with a bill 3, which latter is formed with an eye 3 to receive a rod or bolt. The mousing is of the construction described before.

Fig. 4 shows a further modification, the shank 1 of the hook being provided with an integral eye 11. The general structure of the hook element is that set forth hereinbefore. The eye 11 may receive a rod or other part to which the hook is to be attached.

Having thus described the invention, What is claimed as new is A hook substantially as described, comprising the shank 1, the hook 3 having the bill 3 and the spring-mousing consisting of a strip of spring metal having the shank 6 rigidly at tached at one end to the shank 1 of the hook, the other end of the shank '6 of the mousing being extended toward the bill 3 of the hook and projected outwardly and coiled into a flat spring-helix within the body of the hook and constituting a closure for the mouth thereof, volutes of the helix being located in contact with and between the extremity of the bill 3 and the adjacent portion of the shank 1.

In testimony whereof I aflix my signature in presence of two witnesses.

ANDREW D. HAMILTON.

Witnesses:

J. F. TIBBOT'I, A. J. WVA'ruRs. 

